Fountain-pen.



:Patented June 2, 1903.n 'Y

PATENT OFFICE.

ROBERT A. HAMILTON, OE BROOKLYN, NEW-YORK.

FOUNTAIN-PEN.

SPECIFICATION formingpart of Letters Patent No. 730,117,'datedJ une V2, 1903.

Application filed July 5, 1902. Serial No. 114,350. (No model.) Y' I v.To lr/ZZ whom! it may con/cern:

Be it known that I, ROBERT A. HAMILTON, a citizen of the United States, residing at Brooklyn, city of New York, county of Kings, and State of New York, have invented an Improvementin Fountain-Pens,of which the following description, in connection with the accompanying drawings, is a specification, likeletters` on the drawings representing like parts.

Fountain-pens as commonly constructed are provided with feeding members that lead from the ink-reservoir downward along and in close proximity to the pen, either upon the top or under side thereof, the ink feeding downward by capillary action between this feeding member and adjacent surface of the pen. In my 'eorts to simplify and improve fountaimpens I have discovered-that the pen itself may be provided with a feeding duct or groove which in every way fulfils the requirements without the necessity for a coperating feeding member.

Referring to the accompanying drawings, Figure l in longitudinal section shows upon an enlarged scale a fountain-pen illustrating one embodiment of lmy invention; Fig. 2, a vertical cross-section of 1 on the dotted' line 2 2 and also upon an enlarged scale; Fig.V 3, an under side view of the pen proper, showing the feeding-groove swaged therein; and

Fig. 4c a sectional detail similar to Fig. 2, but

showing the feeding-duct in the top of the pen instead of in the under side thereof.

Referring to the drawings, a is a usual barrel,containing a usual inkreservoirh,the barrel being interiorly, threaded atvits open end to receive a usual pen-section c. This pensection c is shown provided with a longitudinal cylindrical passage c', preferably slightly enlarged or conical at its outer end to receive a plug d, between which and the wall of the said section c is held the pen proper or nib e. The Haring or conical entrance to the passage c', with a correspondingly-shaped plug d, enables the pen to be wedged or clamped more securely in position than would be possible with a cylindrical plug, although the latter may be employed, if desired. The pen e (see Figs. 2 'and 3) is shown as provided with a capillary ink-duct c herein and preferably at its face, formed in any suitable manner, but preferably by swaging upward the pen itself,

so as to form a capillary groove orductleading from the top downward to the vicinity of the endoftheslitinthepen-point. Acapillaryeffect can only be obtained where the walls of the duct directly opposeeach other in close proximity, and in practice'l have found the most convenient. way of obtaining this necessary proximity of the duct-walls to effect this act-ion is by the formation of a small V-shaped duct, the converging walls ofr which tend to prevent other than capillary flow. I have found that ducts formed with curved or circular walls which do not converge fail to bring the interior surfaces of the duct in suiiicient proximity to' give capillary action. The V-shaped groove swaged in the metal pen, however, affords a simple way of obtaining this converging relation andL provides a true capillary duct. The lengthof thisduct will vary more or less, according to the intended use for the pen and also the type or kind of pen used. not draw down between the back of the pen and the wall of the pen-'section c, but that itv does draw easily and freely, but without dan- I find that the ink does ger of excess, along in the capillaryink-duct l e', so that the pen-point -is always provided with ample ink; yet as the ink accumulates somewhat at the underside ofthe pen and in the vicinity of the point the iiow through th'e duct seems'to be retarded, so that there is no danger of the ink dropping .Outward when the pen is not in use.

The plug cl is provided withan axial airsupply or vent-Opening The usual cap f is provided to cover the pen when not required for use and which is mounted upon the top of the barrel when the pen is in use.

In fountain-pens as ordinarily constructed the difficulty encountered in removing and inserting the pen proper andthe adjusting of the same in connection with the feeding member has made it, almost compulsory to use gold or other non-oxidizable pens. My inven` tion, however, by eliminating the feeding member and enabling the pen to be inserted and removed as with 'an ordinary penholder permits me to use steel or otlierconvenient .kinds or types of pens, thus greatly cheapening the cost of the pen in lthis direction, las well as otherwise cheapening it by reason of the simpler construction used. Obviously the number of ink-ducts formed in the pen may be increased, if desired.

In Fig. 4l I have shown the d uct c formed in the top side of the pen instead ofthe under side thereof, and in this construction the pen may fit tightly the passage in the section c, and the plug d may be grooved to receive the projection formed at the under side ofthe pen by the swage of the groove therein.

My invention is not limited to the particular embodiment thereof here shown, as it may be varied without departing from the spirit and scope of my invention.

I claiml. In a fountain-pen the combination with a suitable barrel containing an ink-reservoir of a pen connected thereto and provided with a V-shaped capillary feeding-duct formed therein having Walls in close proximity through which ink may iow from said reservoir to the penpoint.

2. In a fountain-pen the combination with a suitable barrel containing an ink-reservoir of a pen carried at the end ot' said barrel and provided witha V-shaped capillary ink-duct having walls in close proximity swaged or formed therein, and a plug to secure said pen to the end of said barrel.

In a fountain-pen a barrel containing an ink-reservoir, said barrel having a closed end, a longitudinal passage therethrough, a pen arranged in said passage and having a V- shaped capillary ink-duct having` walls in close proximity swaged therein, the ink flowing in said duct and between the said pen and the adjacent wall.

4. In a fountain-pen a barrel containing an ink1'ese1voir, the end of said barrel being closed and provided with a longitudinal passage, a pen arranged in said passage and having a V-shaped capillary ink-duct formed therein, having walls in close proximity and a plug also in said passage and confining said pen therein.

5. In a fountailrpen a barrel containing an ink-reservoir, a pen secured in the end of said barrel and provided with an ink-duct formed therein connecting the pen-point and said reservoir, and a plug confining said pen in the barrel end.

G. In a fountain-pen a barrel containing an ink-reservoir, a pen secured in the end of said barrel and provided with an ink-duct formed therein connecting the pen-point. and said reservoir, and a wedge-shaped plug confining said pen in the barrel end.

7. In a fountain-pen a barrel containing an ink-reservoir, a pen secured in the end of said barrel and provided with an ink-duct formed therein connecting the pen -point and said reservoir, a plug coniining said pen in the barrel end and an inlet or vent opening in said plug.

8. In a fountain-pen, a barrel containing an ink-reservoir, a pen secured in the end of said barrel and provided with an ink-duct formed therein and connecting the pen point and said ink-reservoir, and a plug confining said pen in the barrel end, the confining-wall at one face of said pen being grooved to receive the projectionin the pen produced by the formation of the duct therein.

9. A metallic pen having formed therein one or more capillary feeding-ducts having converging Walls in close proximity.

10. A metallic pen provided with one or more V-shaped capillary ink-ducts having Walls in close proximity.

1l. A metallic pen having formed therein one or more capillary feedingducts having converging Walls in close proximity and extending froxn the shank to the pen-point.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ROBERT A. HAMILTON.

Witnesses:

G. P. CARRINc'roN, EVERETT S. EMERY. 

